1
Inspect the original
Open the highest-quality copy you have and zoom in on one important area. Note whether you see slight softness, directional camera shake, or broad out-of-focus blur.
2
Try a modest improvement
Visit the linked web tool, inspect its available image options, and describe the result you want. If it accepts your image, start with a natural-looking clarity request rather than asking it to invent missing detail.
3
Compare before sharing
Check the same crop in both versions. Look for improved edge definition, but also inspect faces, text, and fine patterns for invented shapes, bright outlines, or a waxy finish.